<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./css/style.css">
</head>
<body>
  <div class="calculator">
    <div class="bar">
      <span></span>
    </div>
    <div class="screen">
      <div class="prev"></div>
      <div class="current"></div>
    </div>
    <div class="buttons">
      <button class="function btn-del" data-type="delete">X</button>
      <button class="function" data-type="clear">AC</button>
      <button class="function" data-type="operate">*</button>
      <button>7</button>
      <button>8</button>
      <button>9</button>
      <button class="function" data-type="operate">/</button>
      <button>4</button>
      <button>5</button>
      <button>6</button>
      <button class="function" data-type="operate">+</button>
      <button>1</button>
      <button>2</button>
      <button>3</button>
      <button class="function" data-type="operate">÷</button>
      <button>0</button>
      <button class="btn-equal" data-type="equal">=</button>
    </div>
    <div class="bar bar-bottom">
      <span></span>
    </div>
  </div>
  <script src="./js/main.js"></script>
</body>
</html>